Manufacturing excellence
From raw-material receipt to container loading, controls are designed to protect compound consistency, tire uniformity, structural integrity, and shipment traceability.
Quality assurance laboratory
Finished-tire quality is evaluated through dimensional checks, tread-depth verification, marking review, visual inspection, and program-specific performance testing.
Inspection results are tied to production identity so technical questions and warranty reviews can be traced back to the relevant product and batch information.
Production sequence
Each stage creates an input for the next. A small dimensional or temperature deviation early in production can affect finished-tire performance, so inspection is built into the process rather than reserved for the end.
Natural rubber, synthetic rubber, steel cord, bead wire, textile, carbon black, silica, oils, and curatives are received against approved supplier and material specifications. Identity, condition, and selected physical properties are checked before release.
Computer-controlled internal mixers combine polymers and ingredients in staged cycles. Time, temperature, rotor energy, and sequence are monitored. Compound samples may be checked for rheometer response, viscosity, dispersion, and density.
Tread and sidewall compounds are extruded to profile. Innerliner, body ply, and steel-belt materials are calendered and cut to specified width and angle. Bead bundles are formed and insulated.
Components are assembled on building drums in a defined sequence. Splice location, overlap, centering, tension, and component alignment are controlled to create a consistent green tire.
The green tire is shaped and vulcanized in a mold under controlled pressure, temperature, and time. The cure cycle forms the tread and sidewall markings while crosslinking the compound system.
Appearance, dimensions, markings, and workmanship are checked. Uniformity and dynamic balance are applied by product program, with X-ray or other internal inspection used according to the control plan.
Quality plan
| Control point | What is checked | Why it matters | Typical record |
|---|---|---|---|
| Compound batch | Mixing parameters and laboratory properties | Wear, heat, adhesion, process stability | Batch and lab release record |
| Prepared components | Width, gauge, weight, profile, cut angle | Uniform construction and material distribution | In-process inspection sheet |
| Building | Splices, alignment, centering, green-tire weight | Uniformity and structural consistency | Machine / operator record |
| Cure | Press, mold, time, temperature, pressure | Correct vulcanization and appearance | Curing trace |
| Finished tire | Visual, markings, dimensions, uniformity/balance | Fitment, ride, regulatory identity | Final inspection and test results |
| Shipment | SKU, quantity, marks, batches, loading | Order accuracy and claim traceability | Packing list and loading record |
Verification and certification
Applicable test plans may include endurance, high-speed performance, bead unseating, strength, dimensional verification, rolling resistance, wet-grip evaluation, or other requirements. The exact plan depends on tire category, size, target regulation, and customer specification.
DOT and ECE markings must correspond to the specific approved product. The quoted SKU list is reconciled with required marks and available documentation before shipment.
Sidewall artwork, naming, mold feasibility, and legal marking zones are reviewed before approval. Tooling and MOQ depend on program scope.
Buyer-appointed third-party inspection can be accommodated when included in the purchase terms and scheduled before loading.
Claims, test results, process trends, and buyer feedback are reviewed to identify corrective and preventive actions.